\documentclass[12pt]{article} 
%	options include 12pt or 11pt or 10pt 
%	classes include article, report, book, letter, thesis  

\title{This is the title} 
\author{Author One 
\\ Author Two} 
\date{29 February 2004}  
\begin{document} 
\maketitle  

This is the content of this document.  
This is the 2nd paragraph. 
Here is an inline formula: 
$   V = \frac{4 \pi r^3}{3}  $. 
And appearing immediately below is a displayed formula: 
$$  V = \frac{4 \pi r^3}{3}  $$ 

\end{document}